Unicast Address Word Upper Register - 7.2 English

AXI 1G/2.5G Ethernet Subsystem Product Guide (PG138)
Document ID
PG138
Release Date
2023-11-15
Version
7.2 English

The Unicast Address Word Upper (UAWU) register is shown in the following register. This register and the register are only used when extended multicast filtering is included in the subsystem at build-time (C_MCAST_EXTEND = 1).

Important: When using extended multicast filtering, the TEMAC core must be placed in promiscuous address filtering mode.

This register allows filtering of unicast frames not matching the address stored in these registers. See Extended Multicast Address Filtering Mode for more information.

Figure 1. Unicast Address Word Upper Register (0x024) AXI Ethernet Page-1 Sheet.2 Sheet.3 Sheet.4 UnicastAddr(47:32) UnicastAddr(47:32) Sheet.7 Reserved Reserved Sheet.11 MSB MSB Sheet.12 LSB LSB Sheet.13 Sheet.14 15 15 Sheet.15 0 0 Sheet.16 16 16 Sheet.17 31 31 Standard Arrow.8 Sheet.1 X14035 X14035 Standard Arrow.5

The following table shows the Unicast Address Word Upper register bit definitions.

Table 1. Unicast Address Word Upper Register (0x024)
Bits Name Access Reset Value Description
31:16 Reserved RO 0x0 Reserved: These bits are reserved for future use and always return zero.
15:0 UnicastAddr R/W 0x00000000 Unicast Address [47:32]: This address is used to match against the destination address of any received frames.

The address is ordered so the first byte transmitted/received is the lowest positioned byte in the register; for example, an Ethernet MAC address of AA-BB-CC-DD-EE-FF would be stored in UnicastAddr(47:0) as 0xFFEEDDCCBBAA.